ERROR in /home/michal/Desktop/eProducts/frontend/src/src/app/core/services/crud.service.ts (98,5): Type 'Promise<ErrorObservable | T[]>' is not assignable to type 'Promise<T[]>'.
  Type 'ErrorObservable | T[]' is not assignable to type 'T[]'.
    Type 'ErrorObservable' is not assignable to type 'T[]'.
      Property 'includes' is missing in type 'ErrorObservable'